Scale-grinding machine.



No. 653,937. Patented July [7. I900.

J. B. OCUNNOR.

SCALE GRINDING MACHINE;

(Application filed Mar. 6, 1900.)

3 Sheets-Sheet (No Model.)

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No. 653,937. Patented July l7 I900. J. R. OCONNUR.

SCALE GRINDING MACHINE.

(Application filed Mar. 6, 1900.)

(No Model.) SheetsSheet 2.

WITNESSES: INVENTOR: 59% ,i 1101mm .Eifllfflwmmm ATTORNEYS,

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Patentedluly l7, I900.

J R OCONNOR SCALE GRINDING MACHINE.

(Application filed Mar. 6, 1900.)

(No Model.)

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JOHN R. OCONNOR, OF NEl/VARK, NEW JERSEY.

SCALE-GRINDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 653,937, dated July17,1900.

Application filed March 6, 1900. Serial No. 7,474. (No model) To allwhom it may concern:

Be it known that 1, JOHN R. OCoNNoR, a citizen of the United States,residing at Newark, in the county of Essex and State of New Jersey, haveinvented certain new and useful Improvements in Scale-Grinding Machines;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to letters of reference markedthereon, which form a part of this The invention consists in theimproved scale-grinding machine and in the arrangements and combinationsof parts of the same, all substantially as will be hereinafter setforth, and finally embraced in the clauses of the claim.

Referring to the accompanying drawings, in which like letters ofreference indicate corresponding parts in each of the several views,Figure 1 is a plan of a portion of the improved scale-grinding machine.Fig. 2 is an eleva tion of the same. Fig. 3 is a sectional view, takenat line a", Fig. 2, in the direct-ion of the arrow. Fig. l is asectional detail of a certain scale holder orguide and Fig. 5 is anothersectional view of said holder, taken transversely at the bottom of saidholder.

In said drawings, a indicates a suitable table, bed, or frame upon whicha drivingshaft 2) is journaled, the journal-boxes c being of anysuitable construction. At one extremity of said shaft is arrangedagrindingwheel (Z, which may be of carborundum, emcry, or other materialsuitable for pearl-grinding. At the inner side of the said wheel, uponthe table a, is arranged a bracket or support '(2. This may be ofcast-iron and is adjustable on said table by means of an adjusting-screw f, or any other suitable means,the said bracket pearl.

inner side of the wheel d, the said bracket or support is provided witha hinge connection j, on which is fastened a longitudinal slotted scaleguide or holder This comprises a long piece of steel having on its facenext adjacent to the wheel a groove Z, Figs. at and 5, of a widthadapted to receive the scales.

Said grooves may be of a width sufficient to receive the largest scalescommonly used, the smaller scales being held in proper grinding relationby the frictional contact of the wheel holding said scales againstoneside wall of the groove. The said groove l varies in depth, it beingdeeper at the top of said holder and more shallow at the lower end, asindicated in broken line in Fig. 2, the graduation, however, being verygradual, so that the pearl is fed very gradually downward toward itsplace of issue at the lower end. The slow feeding and gradual grindingserves to prevent an overheating and burning of the scale and aconsequent reduction in the quality of the At the lower end of thesaidscaleholder the same is provided with an adjusting-screw 1), wherebythe said holder 70 may be thrown toward or from the fiat face of thegrinding-wheel d to efiect a less or greater thickness in the scale, asmay be required, and where the groove Z passes out from the side of thewheel I provide across said groove a keeper screw ordevice m, by meansofwhich the pearl-scale will not be prematurely thrown out of properparallelism with the scaleholder, and thus injured by the grinding wheelprior to a complete detachment of said scale from said wheel.

The face of the pearl is first ground by hand or leveled. The leveledpiece is then fed into the groove of the scale-holder at the open top,the leveled side lying against the inner face or wall of the groove. Thewheel (2, working in connection with gravity, causes the scale to passdownward over the inclined larities are thus removed from the back ofthe scale, the work being very gradual to prevent heating. When thescale arrives at or near the lower end of the scale-holder, it passesbehind the keeper-spring, by which it is held in place in the grooveuntil it is entirely free from the Wheel, when it drops by gravity fromthe grooved scale-holder. Because of the relation of the parts thevarious scales after having passed through the devices will be of auniform and regular thickness ready to be applied to the knife-handle orbe otherwise applied for use.

By the construction thus described no skilled workmen are required, asheretofore; but a boy simply feeds the leveled plates to thescale-holder, so that a number of such leveled scales are constantlyinthe said holder subjected to the grinding operation of the wheel.

Having thus described the invention, what I claim as new is- 1. Thecombination with a grinding-wheel, d, of a grooved scale holder or guide70, arranged at one side of the said wheel opposite the fiat side ofsaid wheel, the groove of which extends vertically downward across thesaid fiat side of said grinding-wheel, the grooved holder being adaptedto hold the scales in grinding position while the said scales gravitateacross the fiat grinding-surfaces of the wheel, substantially as setforth.

2. The combination with the wheel, of a grooved scale-holder, lyingopposite the flatside of the wheel and extending across the flat face ofsaid wheel, and open at the top to receive the scales and at the bottomto permit an exit of the same, substantially as set forth.

3. The combination with the wheel, of a grooved scale-holder, the innerwall of which is inclined to the plane of the side of said wheel, thegroove of said holder being open at top and bottom, substantially as setforth.

4:. The combination with the wheel, of a grooved scale-holder, the innerwall of the groove of which is inclined, the holder being pivoted to asuitable support at the top and adjust-ably fastened at the bottom,substantially as set forth.

5. The combination with the frame, table or bed having a grinding-wheel,of the bracket or support 6, and grooved guide or holder is, pivoted tosaid support at the top and adjustably held at the bottom, substantiallyas set forth.

6. The combination with the frame, table, or bed having the grindingwheel, of an adjustable support and an adjustable and grooved guidelying at one side of the said wheel, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this24th day of February, 1900.

JOHN R. OCONNOR. Witnesses:

CHARLES H. PELL, C. B. PITNEY.

